ADDRESS FIBRE BRAGG STRUCTURE Russian patent published in 2025 - IPC G02B6/34 G01D5/26 

FIELD: physics.

SUBSTANCE: invention relates to fibre-optic sensors based on fibre Bragg gratings (FBG) or structures based thereon. Address fibre Bragg structure (AFBS) comprises a first section of optical fibre with recorded in it FBG of length L₁, having central wavelength λ₁. Besides, AFBS includes in-series connected (N+1)th section of optical fibre without FBG, optical splitter with N number of outputs, to which are connected the first section of optical fibre and N-1 number of sections of optical fibres, in each of which FBG of the same of length L₁, but with different central wavelengths λ_k, so that difference of wavelengths between any pair λ_N∪λ₁; λ_k is unique and is located in the radio range, an optical coupler with N inputs and the (N+2)-th optical fibre section, where k=2, …, N, and N is a natural number, where N≥2. Each output of the optical splitter is connected only to one corresponding optical fibre section with recorded FBGs, which in turn are connected only to one corresponding input of optical coupler, wherein all sections of optical fibres are arranged tightly and parallel to each other so that boundaries of recording sections of FBG-component with length L₁ completely coincide.

EFFECT: reduced total length of AFBS and simplified manufacturing process.

1 cl, 1 dwg